Sanding device



H. POWER.

SANDING DEv|cE.`

APPLICATION FILED DEC. 3i, 1919.

Patented Sept. 14, 1920.

\ sa r Henry Power.

Inventor. f/f

per. Atrney U'NiTEo STATES PATENT OFFICE.

HENRY roWER, or MONTREAL, QUEBEC, CANADA, AssIGNoR F ONE-HALF ToAWILLIAM HALTON, oF MONTREAL, CANADA.

SANDING DEVICE.

Specification of Letters Patent. Y Patented Sept. 14, 1920 Applicationfiled December 31, 1919. Serial No. 348,564.

ments in Sanding Devices; and l hereby declare that the following is afull, clear, and

exact description thereof.

Heretofore considerable inconvenience and loss have been experienced inthev generation of electric power by the pulley and belt driveconnecting an axle of va car with a. dynamo, owing to the fact thatunder certain conditions friction betweenthepulley and belt is reducedto such an extent that ythe pulley actually loses its grip'on thebeltand rotates freely without it. Many attempts haveV been made to increasethe holding power of the belt and pulley by changing the structure ofone or the other without avail and my invention is to cure this defectand increase the friction, and thus overcome the slipping between pulleyand belt whenever the prevailing conditions require and and particularlyduring the Winter season when snow yand ice frequently completelygestroy the friction between the rpulley and elt. f

I solve the problem by providing a device which will project sand orother gritty ymaterial to the contacting surfaces of pulley and belt.More specifically stated the invention consists of an air nozzlecommunicating with a chamber, a sand projecting tube being connected tothe opposite side of lthe chamber leading to a convenient point in closeproximity with the points of contact between the pulley and belt; thenozzle being preferably adjustable. The air supply is controlled Vby amanually operated valve and an automatic valve. The sand receptacle ispreferably air tiglit,"and the connectionr between it and thev sanddelivery Atube' is preferably a loose one to permit back pressure air toescape without entering the sand box. Another feature of the inventionconsists of a protection for the ejector from escaped steam from thevheating equipment of the car or other damping influences.

. For fullcOmprehension however, of my Y invention, reference must behad to the accompanying drawings in which similar reference charactersindicate the saine parts and wherein:

Figure l illustrates in elevation aportion ,of the frame of a passengercar equipped with my invention; j

Fig. 2 is an enlarged vertical sectional view illustrating theconnection between the sand receptacle and delivery tube; and

Fig. 3 is a vertical sectional view of the sand delivery tube andejector.

The apparatus is designed to produce the desired results with the leastpractical amount of sand and compressed air, the principle being to usea small stream'of sand at relatively high velocity, and this only whenadditional friction between pulley and belt is known to be necessary.This reduces the wear of the belt and pulley to a minimum.' Infact it isreasonable to believe that it actually saves wear as compared withcontinued slipping of the pulley within the belt. j

Compressed air is used in an economical manner `by passing vsame througha discharge nozzle l0 designed to produce high velocity, this requiringa minimum amount to produce the desired results. The operation beingcontrolled `manually or by an electrically operated automatic controlvalve. For manual control Ofthesand an operating cock 12 is placed inthe vicinity of the switch panel (as indicated in Fig. 1) so thattrainmen when holding the operating cock open may have a view of thevoltmeter, and as soon as the voltmeter indicates that the dynamo isgenerating, the operating cock may be allowed to close, thus shuttingoff the application of sand. The electrically operated automatic controlvalve 2 'employed by me is preferably of the type commonly used on thecars of electric rail- A ways for signaling, the valve stem constibedisconnected from the dynamo by a] switch The apparatus for supplyingthe sand to the contacting surfaces of the pulley. and

belt comprises a box lll to contain the sand or other comparatively drygritty substance reterred to hereafter as sand. The sand box is littedwith a comparatively tight cover l5 adapted to be held against displacement by the vibration ot the car or other causes, and it may be anydesired shape and located in any convenient place on the car or may besunk in the floor or placed underneath the car tloor. lt `is preferable,but not absolutely necessary, that the bottoni ot the box be inclinedtoward the outlet tube so as to discharge all ot the contents bygravity. The lower end of the neel; 2O enters loosely into the upper endot the sand delivery tubeV j 2l which is sui'liciently larger to providean outlet tor upwardly flowing air due to back pressure in the ejectorand caused by stop page ot the sand projecting tube, or other suse. Thei ee escape oit this baclr pressure air prevents air pressureaccumulating in the sand box and straining it and possibly scatteringits contents. This emergency air outlet is to taire care oi"A the lirstimpulse due to the deflection. of the air, but this is not suilcient tocompensate tor sustained blockage. To obviate the continued leal:- age,ot the back-pressure air a swinging checlr valve 25 is located in thedelivery tube 2l and adapted to romain open under normal conditions otoperation and automatica ly close when there is a continued dow ot sandand air or air alone in the reverse direction.

rlfhe ejector is attached to the lower end of the tube 2l and consistsot ejector body SO presenting a nflm-chamber to receive the sanddelivered through the tube by gravity. One end ot the ejector body isconnected to a tube 32 tor projecting the sand against the contactsurfaces ot the belt and pulley. The opposite end ot the ejector body isiitted with a bushing 33 in which is screwed the adjustable nozzle l0.rlhe end ot this nozzle through which the air is discharged is disposednear the inner end of the sandprojecting tube so tnat only a smallamount of sand flows by gravity in front ot the nozzle. The exactVposition ot the nozzle may be adjusted however by screwing it into, orout ot, the ejector body, and when correctly adjusted it is secured bymeans oi' a lock nut 35 screwed tightly against th end of the ejectorbody. The air discharge opening may be straight or cone shaped, aud

ot such proportions aste produce the maxi# mum velocity. operation thedischarge oi a ir trom the nozzle into the projector tube will tenl toproduce a vacuum which assists gravity in bringing down sand where itwill be thrown or drawn into the projecting tube.

rlhe projecting tube 'Lor to a point within the pulleys and belt,

extends from the ej ecthe space inclosed by and preferably is directedtoward the center of the pulley, in such a manner that regardless ofdirection of rotation ot the driving pulley the sand will be quicklycarried to the belt where it will produce increased friction to overcomethe undesired slipping.

The nozzle l0 is connected to the air pipe line 50 by a combined nut andswivel 5l. The adjacent portion or" the nozzle being et increaseddiameter to receive a strainer 53 which preventsthe sand lodging withinthe pipe line. y

To provide for normal movement of car trucks relative to the car body,the sandprojecting tube is supported, trom the car body only, by anyconvenientiarrangement o't hangers or braces indicated at 40. Thi tubeis preferably placed to one side of the top line ot the belt, and passesit at an angle so that the end oit the tube will be directed as nearlyas possible to the center ot the pulley.

In order to protect the ejector from the dampness of the atmospherebeneath the car, due to escaping steam or other causes, an insulated box('30 oteither metal or wood incloses the saine and the bushing 30 of thenozzle is fitted into one side thereof permitting the nozzle to beadjusted without disturbing the connections between thebox and theejector body or opening'the box, and without disturbing the liller withwhich the box is packed to protect the ejector.

What l claim is as follows l. In railway passenger car equipment thecombination y'ith an axle, a dynamo, a pulley on the axle, a belt loopedaround the pulley, and an operative connection therebetween and thedynamo, of means for supplying sand to the contacting surfaces of thepulley and belt, consisting of a receptacle for sand; an ejector, a sanddelivering tube connecting the sand receptacle to the ejector, an airnozzle with its discharge within the ejector, a sand projecting tubeleading -lt'rom the ejector at a point in` alinement with the nozzle toapoint in close proximity with the contacting surfaces of the pulley andbelt; and means whereby compressed air is supplied to the nozzle.

2. In railway passen nrer car equipment the combination with an axle, adynamo, a pulley on the axle, a belt looped around the pulley andoperative connection therebetween and the dynamo, meansl for supplyingsand to the contacting surfaces ot the pulley and belt, said meansconsisting of a receptacle for sand; an ejector, a sand delivering tubeconnecting the sand receptacle to the ejector, -a check valve withinsaid tube, an air nozzle with its discharge within the ejector, a sandprojecting tube leading from the ejector at a point in alinement withthe nozzle to a point in close proximity with the contacting surfaces ofthe pulley and belt; and means whereby compressed air is supplied to thenozzle, the connection between the sand box and sand delivering tubebeing loose to permit the escape of back pressure air.

3. In railway passenger car equipment the combina-tion with an axle, adynamo, a pulley on the axle, and a belt looped around the pulley and anoperative connection therebetween and the dynamo, means for supplyingsand to the contacting surfaces of the pulley and belt, said meansconsisting of a receptacle for sand; an ejector, a sand delivering tubeconnecting the sand receptacle 'to the ejector, an air nozzle with itsldischarge within the ejector, a'sand projecting tube leading 'fromtheejector at a point in alinrnnentv with the nozzle to a point in closeproximity with the contacting surfaces of the pulley and belt; and meanswhereby compressed air is supplied to the nozzle, an adjustableconnection between the nozzle and ejector. f

1l. ln railway passenger car equipment the combination with an axle,`adynamo, a pulley on the axle, and a belt looped around the pulley and anoperative connection there-between and the dynamo, means for supplyingsand to the contacting surfaces of the pulley and belt consisting of areceptacle for sand; an ejector, a sand delivering tube connecting thesand receptacle to the ejector, a screw threaded bushing within the neckof the ejector, an air nozzle adjustably mounted within the bushing withits discharge within the ejector, and adapted to supply compressed airthereto, a sand projecting tube leading from the ejector at a point inalinement with the nozzle to a point in close proximity with thecontacting surfaces of the pulleyA and belt. 5. In railway passenger carequipment the combination with an axle, a dynamo, a pulley on the axle,and a belt looped around the pulley and an `operative connectionthere-between and the dynamo, means for supplying sand to the contactingsurfaces of the pulley `and belt consisting of a receptacle for sand; anejector, a sand delivering tube connecting the sand receptacle to theejector, an air nozzle with its discharge within the ejector, a sandprojecting tube leading from the ejector at a point in alinement withthe nozzle to a point in close proximity with the contacting surfaces ofthe pulley and belt; and means whereby compressed air is supplied to thenozzle and an insulating box inclosing the ejector and associated parts.

In testimony whereof I have signed my name to this specification in thepresence of two witnesses.

HENRY POVER.

lVitnesses GORDON COOKE, WILLIAM J. C. HEwn'rsoN.

